ABT Permavoid is a multi­functional stormwater management & water conservation systemthat mimics the natural water cycle and can save up to 30% on overall site drainage costs.

Since its introduction ABT Permavoid has revolutionized the way about which stormwater is thought. Its unique capabilities allow eventhe most challenging developed sites to behave like their natural pre-development counterparts. Whether returned to the community watercycle through infiltration or utilized locally through capillary irrigation, ABT Permavoid promotes the most natural, environmentallyfriendly methods of managing water. It is the clear choice on sites both large and small when designing sustainable, resilient landscapesthat enhance neighborhood aesthetics, mitigate flood risks and during periods of drought, conserve our most precious resource.

RETENTION /DETENTION

PERMEABLEINFILTRATION

STRUCTURALSUBBASE

WATERCONVEYANCE

CAPILLARYIRRIGATION

Modular units with 95% void ratio interlock with patented lateral connectors to create a monolithicstormwater management system eliminating the need for end of line ponds and tanks.

The ultra-shallow profile promotes stormwater infiltration over the largest area possible, includingunder traditional pavements like asphalt and concrete removing the added costs of permeable paving.

The ultra-high strength (104 psi yield) safely and reliably transfers traffic loads to subgrade soilsreplacing large volumes of hauled subbase stone.

Stormwater is efficiently transported to discharge locations or landscaped areas for natural reuseeliminating drainage and irrigation pipes.

Patented wicking cones employ capillary action to bring stormwater directly to the root zone oflandscaped areas while keeping it away from evaporative heat and sunlight for up to 60% savings vstraditional sprinkler irrigation.

WHICH SIDE ARE YOU ON?

BEFORE AFTER

WATER IS OUR MOST PRECIOUS RESOURCE:

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SUBBASE REPLACEMENT

Minimize excavation costs whilereducing runoff and meeting stormwaterBMP objectives.

Ultra shallow envelope avoids surfacebedrock, contaminated subgrades andhigh water tables.

Maximize stormwater attenuationthrough increased surface area forinfiltration

Eliminate large diameter, deep pipes byrouting stormwater into Permavoid at it'ssource.

Reduce flood risks by storing water toreduce runoff and control discharge rates.

Maximize the performance of permeablesurfaces by storing and conveying waterwithin Peramvoid.

Minimize subgrade improvement bydissipating heavy traffic loads throughthe Permavoid interlocking structuralraft.

Permavoid is exceptionally capable of withstanding heavytraffic loads. As a result it is often used to replacetraditional stone subbase in order to add safety andfunctionality. When poor subgrade soils are presentPermavoid can be utilized to help spread traffic loadswithout complicating the problem by adding dead loads. With ideal subgrades Permavoid is used under traditionalimpervious pavement to allow them to behave likepermeable surfaces while maximizing infiltration area. With nearly any subgrade Permavoid can be used toconvert traditional subbase into an extensive stormwatermanagement tool capable of both conveyance and storage.

SR

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6"

12"

18"

24"

1.0' 1.5' 2.0' 2.5' 3.0'

7.0' Deep

6.0' Deep

5.0' Deep

4.0' Deep

1.5' Deep

Asphalt Layers

Subbase Layers

Conveyance Layers

- Excavation

- Pipe Bedding

- Compacted Backfill

+ Pipe Cover

+ Pipe Slope

- Drainage Pipe

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PIPE REPLACEMENT

Minimize excavation costs whilereducing runoff and meeting stormwaterBMP objectives.

Avoid subgrade conflicts such asbedrock, contaminated ground, buriedutilities and high water tables.

Maximize stormwater attenuationthrough increased surface area forinfiltration

Eliminate large diameter, deep pipes byrouting stormwater into Permavoid at it'ssource.

Reduce flood risks by storing water toreduce runoff and control discharge rates.

Maximize the performance of permeablesurfaces by storing and conveying waterwithin Permavoid.

Minimize subgrade improvement bydissipating heavy traffic loads throughthe Permavoid interlocking structuralraft.

Throughout history stormwater drainage pipe has served as the primary means to move water from one location to another.To do so these systems require progressively larger diameters with everincreasing depths that create large volumes of excavation to haul away andextensive material / labor to backfill with compaction. Now with ABT,Permavoid these costs can be eliminated. ABT, Permavoid's ultra highstrength and unique highly voided internal structure allows these traditionallydeep conveyance layers to fit within the subbase layer.

PR

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45°

18°

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DETENTION REPLACEMENT

Minimize excavation costs whilereducing runoff and meeting stormwaterLID and BMP objectives.

Create offsetting costs by accomplishingmultiple drainage functionssimultaneously.

Design stormwater detention that remainsaccessible for easy and natural reuse onsite.

Reduce construction time and cost bysimplifying detention within acontinuous, uniform layer of ABT,Permavoid.

Prevent subgrade conflicts such asbedrock, contaminated ground, buriedutilities and high water tables.

Mitigate roadway damage by eliminatingmassive volumes of hauled materials.

Avoid the hazards and liability of deepexposed surface water from open pondsthrough subbase detention with ABT,Permavoid.

Eliminate unsightly trash and debrisbuild­up that reduces property values.

Maximize land use by preventing thewasted area dedicated to open ponds.

Detention is a critical step for effective stormwater management systems. While traditional methods have been effective thusfar, they have always come with trade­offs. With open ponds there are serious concerns of safety, aesthetics, maintenance andland use. With pipe / stone systems; construction time, materials handling and potential conflicts become driving factors. With ABT, Permavoid these pitfalls of historical approaches can be averted while promoting the most responsible and naturalpre­development behavior of our stormwater.

DR

Permavoid Subbase Detention

Pipe & Stone Detention Open Pond Detention

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PASSIVE IRRIGATION

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Achieve the classic look and feel ofnatural turf without costly irrigation.

Provides the ideal base for precisiongraded lawns, landscaping and playingsurfaces.

Maximizes LID performance by reducingstorm­ water discharge throughevapo­transpiration.

Mimics pre­development stormwaterbehavior by maximizing green spacefunctionality.

Reduces heat­island effect throughnatural and biological evaporationprocesses.

Eliminates costly irrigation systems bywicking stored water to turf andlandscaped areas.

Reduces runoff by converting stormwaterfrom a waste product to a valuableresource.

Healthy green lawns and landscaping beds add to theproperty values and aesthetics of any neighborhood orcommercial area. With Permavoid's unequaled strength,water can be held very near the surface and in turn allowfor passive irrigation. This assures plants remain at theirbest even during periods of drought. With heavy rainfallstormwater is retained for later use. During dry monthsthe spigot or well water can be used to partially fill thetank. In both cases Permavoid keeps this preciousresource away from evaporative sunlight and heatinsuring the water is used precisely where it is intended.

PI

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Bioswales provide a great opportunity to naturally treatand manage stormwater while adding bio­diversity andaesthetic appeal to any urban or rural landscape. Permavoid complements and enhances this by optimizingtheir footprint and maximizing their functionality. Excesswater is stored in an ultra shallow profile allowingextended contact time for bio­remediation,evapo­transpiration and/or infiltration. Permavoidcombined with bioswales create resilient landscapes thatharness stormwater as an indispensable resource andutilize it to the fullest extent.

Maximize shallow storage andconveyance assuring the bestbioswale efficiency.

Add aesthetically pleasing greenspace promoting increased propertyvalue.

Maximize LID performance byreducing stormwater dischargethrough evapo-transpiration.

Mimic pre-developement stormwaterbehavior by maximizing green spacefunctionality.

Reduce the heat-island effect throughnatural and biological evaporationprocesses.

Minimize liability by controllingexposed surface water elevations.

Maximize bio-remediation by storingexcess runoff until further capacity isavailable.

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BIOSWALE OPTIMIZATIONBO

TREE PROTECTION

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Large, healthy trees offer tremendous aesthetic appealwhether in rural or urban areas. Difficulty arises however,specifically in cities, where heavy traffic loads must betransferred to sub­grade soils. Permavoid offers the idealbalance of load transference and surface protection. First,the void space created offers a guided path for stormwaterto infiltrate through the root zone providing vital irrigationdirectly where it is needed most. Second, during periodswithout rainfall an air gap is present preventing roots frommigrating upward and damaging valuable infrastructurewhile maintaining air circulation directly to the root zone. These features mean stormwater behaves more naturallywhile trees are provided an ideal growing environment.

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Protect mature trees to enhanceurban aesthetics, quality of life andproperty values.

Increase LID effectiveness throughlocal stormwater storage, attenuationand infiltration.

Minimize subgrade compaction bydissipating heavy urban loadsthroughout the structural ArborRaft.

Permavoid's natural air gap preventsupward migration of roots; protectingpedestrian walkways and promotingpositive air circulation.

Maximize the performance ofpermeable surfaces by storing andconveying water within Permavoid.

Create ideal environments, evenbeneath city streets, to promotehealthy tree growth.

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RESILIENT LANDSCAPES

Bioswales provide a great opportunity to naturally treatand manage stormwater while adding bio­diversity andaesthetic appeal to any urban or rural landscape. Permavoid complements and enhances this by optimizingtheir footprint and maximizing their functionality. Excesswater is stored in an ultra shallow profile allowingextended contact time for bio­remediation,evapo­transpiration and/or infiltration. Permavoidcombined with bioswales create resilient landscapes thatharness stormwater as an indispensable resource andutilize it to the fullest extent.

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Maximize shallow storage andconveyance assuring the bestbioswale efficiency.

Add aesthetically pleasing greenspace promoting increased propertyvalue.

Maximize LID performance byreducing stormwater dischargethrough evapo-transpiration.

Mimic pre-developement stormwaterbehavior by maximizing green spacefunctionality.

Reduce the heat-island effect throughnatural and biological evaporationprocesses.

Minimize liability by controllingexposed surface water elevations.

Maximize bio-remediation by storingexcess runoff until further capacity isavailable.

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GEOFOAM SUPPLEMENT

Maintain minimal soil bearing pressureswith lightweight, ultra high strengthABT, Permavoid.

Avoid shifting subgrades and instabilityby preventing ground water buoyancyforces.

Eliminate flotation counter­ measuresincluding anchoring slabs and thickoverburden.

Prevent lateral pressures through naturalhorizontal conveyance and water levelequalization.

Ward off long term failure fromfluctuating water tables and associatedpressure changes.

Create a vast subgrade control structurethat mimics and/or improves naturalwater movement.

Minimize subgrade improvement through the ABT, Permavoidinterlocking structural base.

Provide a stable working surface toprevent hazardous or unsafe constructionconditions.

Reduce construction delays by allowingponding below the working surface.

Since the 1970's geofoam has been used to reduce the overburden pressures ontop of weak subgrade soils. The success of this lightweight fill has allowedconstruction in locations that would have otherwise been impossible. Now withABT, Permavoid that success can be taken one step further in cases of highground water. Rather than adding to the problem with heavy cover or anchoredbases to prevent buoyancy forces, ABT Permavoid's ultra high strength, lowweight and open cell structure allows water to freely flow into and out of thesystem without creating vertical uplift forces. Additionally the Permavoid basepromotes the most natural lateral movement of ground water further preventinghydrostatic pressures while creating the perfect foundation to build upon.

A

E

C

D

BConcrete Cap-Subbase

ABT Foam - GeoFoam

Notes & Features

Asphalt Pavement

Compacted Subbase

Subgrade

F Geotextile (Mirafi 1100N)

H

I

GSeasonal High Water Table

Low Strength Saturated Subgrade

Permavoid 150 Lighweight Water Management

GS

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Other Applications

Hybrid SolutionsProvides multi­surface interconnectedness assuring optimal drainage functionality and safety.Converts traditional concrete and asphalt pavement into pervious surfaces for infiltration.Easily transition between multiple surfaces without complicated terminations or connections.Expedites site work by replacing complex excavations with simple grading.

Green / Blue RoofsRainfall storage on the roof allows larger building footprints while meeting LID criteria.High strength and light weight Permavoid minimizes dead loads allowing structures to carrylarger volumes of water and maximize plant diversity.Passive irrigation offers precious water directly to plant roots preventing wasteful evaporation.

Permeable PaversMinimize excavation by replacing up to 18 inches of subbase drainage aggregate.Reduce construction costs by supplementing permeable pavers with Permavoid under traditionalsurfacing allowing it to behave equally while maximizing infiltration capabilities.

EquestrianProvides the ideal base for precision graded surfacing for all types of equestrian events.Create the ideal moisture content within sand surfacing through the capillary action ofPermavoid's passive irrigation.Minimize downtime after heavy rainfall events through Permavoid's superior storage volume.

Athletic FieldsEliminates collector pipe excavation and materials while increasing stormwater source control. Protects expensive synthetic infill turf fields by maximizing permeability and water storage. Eliminates settlement concerns through high strength interconnected units and load distribution.Provides the ideal base for precision graded athletic fields for all levels of play.

Water HarvestingReduce operating budgets by replacing costly irrigation with water captured on site.Capture rainwater to flush toilets, wash cars, wash clothes or purify for drinking water.Reduce demands on local ground water by saving rainwater within Permavoid.Reduce runoff by diverting excess water to Permavoid for use during periods of drought.

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PV­150 Typical Cross Sections

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OCCASSIONAL H-20Typical of Commercial Deliveries

CARS ONLYTypical of Parking Areas

PEDESTRIANTypical of Sidewalks

ENGINEERINGFor Alternate Cross Sections

11" Modified Granular Sub-Base Material

Geotextile Fabric

Permavoid 150 Units

2" Bedding Material

Prepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

2" Asphalt Surface Course

3" Asphalt Binder Course

IMPORTANT PERMAVOID LOADING CHARACTERISTICS:

Long Term Sustained Dead Load 24 psi (100 yr. Creep Limit)

Short Term Elastic Live Load 104 psi

Ultimate Unconfined Crush Strength 169 psi

Stress-Strain Relationship 0.125 in. PER 58 psi

For assistance please call 1-800-438-6057 or visit www.abtdrains.com

REGULAR H-20Typical of Loading Docks

2" Permeable Pavers1 1/2" Modified Granular Sub-Base MaterialGeotextile FabricPermavoid 150 Units

2" Bedding Material

Prepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

2 1/2" Asphalt Surface Course

2" Modified Granular Sub-Base Material

Geotextile Fabric

Permavoid 150 Units

2" Bedding Material

Prepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

3" Permeable Pavers

2" Single Size (1/4") Bedding Layer

Geotextile FabricPermavoid 150 Units

2" Bedding MaterialPrepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

3" Asphalt Surface Course2" Modified Granular Sub-Base Material

Geotextile Fabric

Permavoid 150 Units

2" Bedding Material

Prepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

2" Single Size (1/4") Bedding Layer

5 1/2" Modified Granular Sub-Base Material

Geotextile Fabric

Permavoid 150 Units

2" Bedding Material

Prepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

3" Permeable Pavers

3" Asphalt Binder Course

5 1/2" Modified Granular Sub-Base Material

Geotextile Fabric

Permavoid 150 Units

2" Bedding Material

Prepared Subgrade (5% min. CBR)

Geotextile Fabric and/or Membrane Liner

2" Asphalt Surface Course

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PO Box 837 | 259 Murdock Road | Troutman, NC 28166toll-free 800.438.6057 • phone: 704.528.9806 • fax: 704.528.5478www.abtdrains.com

DISCLAIMER: The customer and the customer’s architects, engineers, consultants and other professionals are completely responsible for the selection, installation, and maintenance of any product purchased from ABT, and EXCEPT AS EXPRESSLY PROVIDED IN ABT’S STANDARD WARRANTIES, ABT MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO THE SUITABILITY, DESIGN, MERCHANTABILITY, OR FITNESS OF THE PRODUCT FOR CUSTOMER’S APPLICATION. Copies of ABT’s standard warranties are available at www.abtdrains.com.

The information contained within is believed to be accurate but not guaranteed to be so. The customer should evaluate the suitability and safety of these products for any application. ABT assumes no liability for the end results since the conditions of installation and use are beyond the control of ABT. Concrete specifications, placement, reinforcement and structural considerations are the responsibility of the customer. ABT reserves the right to change the price, availability, specifications, and content of any of its products, literature or other information in all media at any time without notification.

PolyDrain®, PolyDyn®, PolyChampion®, GreenDot®, RedDot®, PolyWall®, TrenchFormer® are registered trademarks of ABT, Inc.®. USA Patent Numbers 5,281,051; 5,348,421; 5,393,171; 5,399,047; 5,573,350; 5,702,204; 5,890,839; 6,443,656; 6,533,497; 6,926,245 : Canada 2,080,136; 2,131,866; 2,131,867; 2,139,405; 2,139,407 : Mexico 189,218; 189,436; 197,851 : Other US and foreign patents pending.

Advanced Building Technologies, Inc.

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ABT Permavoid is a multi­functional stormwater management & water conservation system thatlocally mimics the natural water cycle and can save up to 30% on overall site drainage costs.

RETENTION /DETENTION

WATERCONVEYANCE

PERMEABLEINFILTRATION

STRUCTURALSUBBASE

CAPILLARYIRRIGATION